Sin it can only be for religious fanatics. For me, this is a great opportunity to have fun and win a good amount.
Though it is a great opportunity but keep it in your mind that the chances of winning is very less so you will loose your bets and it is only fun when you win some money or you can say that it is a temporary fun. So for me it is not acceptable, gambling is highly risky so stay away if you want to save your bitcoins.